AIIMS 2013
- Exam
- AIIMS
- Year
- 2013
- Subject
- Chemistry
- Chapter
- Coordination Compounds
AIIMS 2013 · Chemistry · Coordination Compounds
Assertion : Aq. solution of CoCl_2 is pink in colour. It turns blue...
Assertion : Aq. solution of is pink in colour. It turns blue in presence of conc. . Reason : It is due to the formation of \left[\mathrm{CoCl}_4\right]^{2-}.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion.
- BIf both assertion and reason are true but reason is not the correct explanation of assertion.
- CIf assertion is true but reason is false.
- DIf both assertion and reason are false.
Correct answer
A. If both assertion and reason are true and reason is the correct explanation of assertion.
Step-by-step solution
Pink
Blue
According to Le Chatelier's principle, on adding conc. , the equilibrium shifts in forward direction giving blue colour. And when this blue colour is diluted, equilibrium shifts in backward direction leading to pink colour.